menu on pages stays open

Hi all,
all of a sudden my menu and all submenues stays open on pages and overlaps the content.
This does neither occur on the startpage nor on blog pages.
Please have a a look at http://www.tsg-heilbronn.de
You can see how the menu “DER VEREIN” should look while you are on the start page or on any post.
Choose any menu entry of “DER VEREIN” and you will see, that the menu stays open on the following page.
The submenu of “Vereinsstruktur” (which has two subentries) is open also and the subentries are shown always, too. (That submenu problem occurs also with the second menu “VEREINSANGEBOTE”, but this menu closes and does not stay open.)

I tried to get rid of the problem with different page templates or new menues, which neither did help.

Any tip to get rid of the problem would be appreciated!

If you need my wp credentials, just tell me so.

thanks
regards
achim

Hi Alex,
I know, that it is somehow connected to the wp bakery page builder plugin. But since that works on my other sites, it is definitely related to some code within the newsmag theme…
Deactivating wp page builder gets the menu functionality back. Since all of my pages are build with it however, I would like to keep the page builder. Unless you have a solution which lets me convert these to tag div composer pages hassle free 😉
thx
regards
achim

Any news on the problem?